   Chapter 3, Problem 21P Essentials of Statistics for the B...

8th Edition
Frederick J Gravetter + 1 other
ISBN: 9781133956570

Solutions

Chapter
Section Essentials of Statistics for the B...

8th Edition
Frederick J Gravetter + 1 other
ISBN: 9781133956570
Textbook Problem

One sample has a mean of M = 8 and a second sample has a mean of M = 16. The two samples are combined into a single set of scores. a. What is the mean for the combined set if both of the original samples have n = 4 scores? b. What is the mean for the combined set if the first sample has n = 3 and the second sample has n = 5? c. What is the mean for the combined set if the first sample has n = 5 and the second sample has n = 3?

a.

To determine

To Find: The mean for the combined set when n1=n2=4.

Explanation

Given info:

Mean for two samples are 8 and 16 respectively.

Calculation:

Calculate sum of scores, X1 and X2 for the two samples as:

X1=n1×M1=4×8=32

Similarly,

X2=n2×M2=4×16=64

T

b.

To determine

To Find: The mean for the combined set when n1=3 and n2=5

c.

To determine

To Find: The mean for the combined set when n1=5, and, n2=3.

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